Home / 558,121.20-836,663.40-389,641.20

Finding the Fourth Proportional to 558,121.20, 836,663.40 and 389,641.20

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Solution

The fourth proportional to 558,121.20, 836,663.40 and 389,641.20 is: 584,099.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    558,121.20 : 836,663.40 = 389,641.20 : x
  2. Step 2: Convert to fraction form
    558,121.20/836,663.40 = 389,641.20/x
  3. Step 3: Cross multiply
    558,121.20x = 836,663.40 × 389,641.20
  4. Step 4: Simplify right side
    558,121.20x = 325,998,531,172.08
  5. Step 5: Solve for x
    x = 325,998,531,172.08/558,121.20
  6. Step 6: Final answer
    x = 584,099.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.